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Earn 100

Which one of the following precedes reformation of the nuclear envelope during M phase of the cell cycle
(a)Condensation of chromosomes, and reassembly of the nuclear lamina
(b)Decondensation of chromosomes, and reassembly of the nuclear lamina
(c)Formation of the contractile ring, and formation of the phragmoplast
(d)Formation of the contractile ring, and transcription from chromosomes.

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Important Questions on Cell Cycle and Cell Division
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During metaphase, spindle fibres attach to ________.
Centromeres split and chromatids __________ during __________.

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(A) The stage between two meiotic divisions is called interphase
(B) During zygotene, the pairing of homologous chromosomes and synapsis takes place.
(C) Initiation of mitotic spindle takes place during metaphase
(D) In animals, mitotic cell division takes place in diploid somatic cells and not in haploid cells

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A) Cells of the lining of the gut are replaced by mitotic division constantly
B) Formation of liquid endosperm takes place, if karyokinesis is not followed by cytokinesis
C) In telophase, the chromosomes reach the poles and condenses to form the chromatic network
D) In quiescent stage, the cell is metabolically inactive.

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Select the correct statements.
A. Tetrad formation is seen during the Leptotene.
B. During Anaphase, the centromeres split and chromatids separate.
C. Terminalization takes place during Pachytene.
D. Nucleolus, Golgi complex and ER are reformed during Telophase.
E. Crossing over takes place between sister chromatids of homologous chromosomes.
Choose the correct answer from the options given below:

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Reason (R): Mitosis divides a parent cell into two daughter cells

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(i) Chromosomes cluster at opposite spindle poles and their identity is lost as discrete elements
(ii) Nuclear envelope assembles around the chromosome clusters
(iii) Nucleolus, Golgi complex and ER reform

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